Malicious PDF — malware analysis report

Static analysis result for SHA-256 1305f9d9c2f0d707…

MALICIOUS

PDF

49.3 KB Created: 2020-07-21 10:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06d59c0b633eb3ef3d2c92af0c4537d1 SHA-1: c1ae98ee10acd1d3724b7c42130a35d086670f1f SHA-256: 1305f9d9c2f0d707adb7fa695c3ae57a0dc678259d2ddb12451ca48682d8b24c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious due to its use of a redirector link pointing to known malicious infrastructure, disguised as an academic essay. It also hosts a large number of external PDF links, many of which are likely part of an SEO link farm designed to distribute malware. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=philosophy%20of%20education%20essay%20pdf In PDF document text
    • http://files.sophiebehal.com/uploads/1/3/0/7/130740464/97873ee4434e96b.pdfIn PDF document text
    • http://files.jdbscholarship.com/uploads/1/3/1/0/131069968/4547042.pdfIn PDF document text
    • http://files.poetryxhunger.com/uploads/1/3/1/8/131856619/wuvuw_nikojo_safop_merakavome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/rijewarigasutitizirumibib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/vanakosutokonovaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://nobijip.files.wordpress.com/2020/07/11772990999.pdfIn PDF document text
    • https://fesopalom.files.wordpress.com/2020/07/zipab.pdfIn PDF document text
    • https://wekusov.files.wordpress.com/2020/06/60421407042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/takedinuvejipususukagugit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/gepawetofunokaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/98265250440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/nurum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/20604720305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/69072925125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/zikorogafilarigexaxezu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8518 5132 bytes
SHA-256: 0f10f46632c2e9d8a007588a7fdc4037fddfbe53b9e23fe60d826d1f3e414845
font_01_sfnt_off0000968b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968B 9840 bytes
SHA-256: d671aab6fb633a834765ffdc6e135537f94cac502fc2cc13a7ea625957a60c2b

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